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Texas Instruments CDCE813QPWRQ1
- Part No.:
- CDCE813QPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CDCE813QPWRQ1.pdf
- Description:
- IC CLOCK SYNTHESIZER 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,029
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Product details
Overview
CDCE813QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 2 automotive clock synthesizer and jitter cleaner featuring a single configurable PLL, three LVCMOS outputs (Y1–Y3), 1.8V core supply, and dual-output voltage support (2.5V/3.3V). It accepts 8–32MHz crystal or up to 160MHz LVCMOS input, delivers up to 230MHz output with typical 50ps cycle-to-cycle jitter, and targets cluster and ADAS timing subsystems.
For engineers reviewing the CDCE813QPWRQ1 datasheet, CDCE813QPWRQ1 pinout, CDCE813QPWRQ1 application, or CDCE813QPWRQ1 equivalent, key selection considerations include its I2C-programmable PLL architecture, factory-default tri-state outputs requiring explicit enable, S0/S1/S2 control pin flexibility, integrated VCXO for external frequency synchronization, and automotive-qualified thermal performance (–40°C to 105°C).
Technical Context
The CDCE813QPWRQ1 implements a single deep-M/N divider PLL with integrated loop filter components automatically tuned per VCO frequency and divider settings to optimize jitter transfer and stability. Its PLL supports center-spread or down-spread SSC modulation (±0.25% to ±2.0%) for EMI reduction and enables zero-PPM clock generation from common reference frequencies like 27MHz.
It features dual-function S1/SDA and S2/SCL pins-defaulting to I2C programming but reconfigurable as general-purpose control inputs-and a dedicated S0 control pin unused by default. Output drivers are LVCMOS with programmable duty cycle (45–55%), skew <440ps (Y1–Y3 at 50MHz), and separate VDDOUT pins supporting 2.5V or 3.3V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCO Frequency Range | 70–230 MHz - defines maximum achievable output frequency via PLL multiplication |
| Output Frequency Max | 230 MHz - supports high-speed interfaces including USB, Ethernet, and video PCLK |
| Cycle-to-Cycle Jitter | Typical 50 ps - ensures stable timing margins in jitter-sensitive applications like display and audio |
| Input Frequency Range | 8–32 MHz crystal or 0–160 MHz LVCMOS - enables flexible clock source selection |
| Operating Temperature | –40°C to 105°C ambient - meets AEC-Q100 Grade 2 requirements for automotive under-hood use |
| Core Supply Voltage | 1.7–1.9 V (nominal 1.8 V) - low-power operation compatible with modern SoC power domains |
| Output Supply Options | 2.5 V or 3.3 V on VDDOUT pins - allows direct interfacing with mixed-voltage logic systems |
Pinout & Package
Packaged in 14-pin TSSOP (PW), 5mm × 6.4mm footprint, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Xin/CLK | Input | Accepts crystal (8–32 MHz) or LVCMOS clock (up to 160 MHz); selectable via I2C |
| Xout | Output | Crystal oscillator output; leave open or pull up when not used |
| S0 | Input | User-programmable control input (LVCMOS, 500-kΩ pullup); unused by default in CDCE813QPWRQ1 |
| S1/SDA | I/O or Input | Default: bidirectional I2C data line; configurable as control input S1 via EEPROM |
| S2/SCL | Input | Default: I2C clock input; configurable as control input S2 via EEPROM |
| Vctr | Input | VCXO control voltage (0–1.8 V); enables external frequency synchronization |
| VDD | Power | 1.8 V core supply; powers internal logic and PLL |
| VDDOUT (pins 6,7) | Power | Separate 2.5 V or 3.3 V supply for all three LVCMOS outputs Y1–Y3 |
| Y1, Y2, Y3 | Output | LVCMOS outputs; individually programmable frequency, duty cycle, and state (active/Hi-Z/power-down) |
| GND (pins 5,10) | Ground | Dual ground connections for noise isolation between analog (PLL) and digital sections |
Key Features
| Feature | Design Value |
|---|---|
| In-system programmability via I2C | Enables field firmware updates and dynamic configuration without hardware change |
| Nonvolatile EEPROM storage | Persists custom settings across power cycles; supports 100–1000 write cycles with 10-year retention |
| Integrated VCXO with programmable load capacitance (0–20 pF) | Allows precise frequency pulling (±120–150 ppm) using external control voltage or PWM signal |
| Three independent LVCMOS outputs with programmable skew control | Supports multi-clock domain systems (e.g., video + audio + interface) with sub-500ps inter-output skew |
| Spread-spectrum clocking (SSC) | Reduces peak EMI emissions via center/down-spread modulation (±0.25% to ±2.0%) |
Applications
| Cluster Instrumentation | Head Unit Audio/Video |
|---|---|
Use Scenario: Generating synchronized pixel clock (PCLK), audio master clock (AMCLK), and system bus clocks in digital instrument clusters. IC Role / Device Role / Timing Role: Central jitter-cleaned clock source distributing multiple phase-aligned frequencies to MCU, display controller, and CAN transceiver. Use Value: Eliminates need for discrete oscillators per subsystem, reduces board space, and ensures deterministic timing across display refresh, gauge animation, and warning signal generation. | Use Scenario: Providing clean, zero-PPM audio sample clocks (e.g., 44.1/48/96 MHz) and video timing signals (e.g., HDMI TMDS clock) in infotainment head units. IC Role / Device Role / Timing Role: Low-jitter clock synthesizer generating synchronized audio/video clocks from a single 27 MHz crystal. Use Value: Prevents audible artifacts and video tearing by maintaining tight period jitter (<50 ps) and duty cycle (45–55%) across all outputs. |
| Navigation Systems | ADAS Sensor Fusion |
Use Scenario: Delivering precise GPS baseband clock (e.g., 16.368 MHz), RF front-end sampling clocks, and processor core clocks in automotive navigation modules. IC Role / Device Role / Timing Role: Programmable jitter cleaner converting noisy GPS receiver clock into stable, low-phase-noise timing references. Use Value: Improves GPS position accuracy by reducing timing-induced errors in correlator processing and ADC sampling. | Use Scenario: Synchronizing radar, camera, and ultrasonic sensor clocks in advanced driver assistance systems for time-of-flight and image stitching. IC Role / Device Role / Timing Role: Multi-output clock generator providing phase-coherent clocks to heterogeneous sensor SoCs and FPGA pre-processing units. Use Value: Enables nanosecond-level timestamp alignment across sensors, critical for fusion algorithms requiring sub-microsecond temporal correlation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock synthesizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDCE813R02QPWRQ1 | S0 pin defaults to active-high Y1 output enable; CDCE813QPWRQ1 requires I2C to enable Y1 | Better suited for designs needing immediate Y1 activation at power-up without I2C initialization | Select CDCE813R02QPWRQ1 if hardware-level output enable is required before firmware brings up I2C |
| CDCE913QPWRQ1 | Two independent PLLs (vs. one), higher integration, supports 100+ MHz input, wider VCO range (60–800 MHz) | Targeted at multi-domain SoC platforms requiring independent clock trees (e.g., CPU + GPU + DSP) | Choose CDCE913QPWRQ1 only when dual-PLL architecture or >230 MHz output is mandatory |
Compared with CDCE813R02QPWRQ1, CDCE813QPWRQ1 offers greater I2C-based configurability at the cost of delayed Y1 activation; versus CDCE913QPWRQ1, it provides lower cost and simpler programming for single-PLL automotive timing needs without over-engineering.
Availability
CDCE813QPWRQ1 is available at Aetrix Electronics and suitable for cluster instrumentation, ADAS sensor fusion, and infotainment head unit designs requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for CDCE813QPWRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and automotive-grade ICs with decades of leadership in clocking solutions.
The CDCE813QPWRQ1 belongs to TI's automotive clock synthesizer product line, designed specifically for jitter-critical timing in automotive infotainment, instrumentation, and ADAS systems where AEC-Q100 qualification and EMI-reduction features are essential.
FAQ
What is the default power-on behavior of CDCE813QPWRQ1 outputs?
By default, all three outputs (Y1, Y2, Y3) of the CDCE813QPWRQ1 are in high-impedance (tri-state) mode after power-up. Unlike the CDCE813R02QPWRQ1 variant, CDCE813QPWRQ1 does not enable Y1 automatically via S0 pin-outputs must be explicitly enabled through I2C register writes. This prevents unintended clock injection during boot sequence.
Can CDCE813QPWRQ1 generate zero-PPM clocks, and how is this achieved?
Yes, CDCE813QPWRQ1 can generate zero-PPM clocks using its deep M/N divider architecture. When configured with appropriate integer or fractional division ratios (e.g., deriving 48 MHz from 27 MHz), it eliminates accumulated timing drift. The device achieves this without external calibration-zero-PPM accuracy is inherent to the synthesized frequency relationship defined in its PLL configuration registers.
How does the VCXO function work in CDCE813QPWRQ1, and what is its pulling range?
The CDCE813QPWRQ1 integrates a voltage-controlled crystal oscillator (VCXO) where the Vctr pin accepts 0–1.8 V control voltage to adjust output frequency. With proper crystal selection and PCB layout, it achieves ±120 to ±150 ppm pulling range. This enables synchronization to external signals (e.g., PWM from ECU) for dynamic EMI reduction or frequency trimming without changing the base PLL configuration.
What are the I2C interface limitations and capabilities of CDCE813QPWRQ1?
CDCE813QPWRQ1 supports standard-mode (100 kbps) and fast-mode (400 kbps) I2C communication with 7-bit addressing. Its S1/SDA and S2/SCL pins default to I2C but can be reconfigured as general-purpose control inputs via EEPROM programming. After reconfiguration, I2C access is disabled unless VDDOUT is forced to GND to temporarily restore SDA/SCL functionality.
Is CDCE813QPWRQ1 pin-compatible with other devices in the CDCE813-Q1 family?
CDCE813QPWRQ1 shares the same 14-pin TSSOP (PW) package and pinout with CDCE813R02QPWRQ1 and CDCE813QPWRQ1 variants. However, functional differences exist-especially in S0 pin behavior and default output states-so PCB layout is mechanically compatible, but firmware and power-up sequencing must be verified per variant to ensure correct operation.
CDCE813QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Clock Synthesizer, Jitter Cleaner
- PLL:
- Yes with Bypass
- Input:
- LVCMOS, Crystal
- Output:
- LVCMOS, Crystal
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:3
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 230MHz
- Divider/Multiplier:
- Yes/Yes
- Voltage - Supply:
- 1.7V ~ 1.9V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 14-TSSOP
CDCE813QPWRQ1 FAQ
1.How can I place an order for CDCE813QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CDCE813QPWRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CDCE813QPWRQ1 reliable?
The price and inventory of CDCE813QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CDCE813QPWRQ1 is usually 5 days.
3.What payment methods are accepted for CDCE813QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CDCE813QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CDCE813QPWRQ1?
CDCE813QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CDCE813QPWRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CDCE813QPWRQ1?
For technical support, including CDCE813QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CDCE813QPWRQ1 requirements.
6.How does Aetrix verify that CDCE813QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All CDCE813QPWRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CDCE813QPWRQ1 meets industry standards.
7.What is the process for return or replacement of CDCE813QPWRQ1?
All CDCE813QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with CDCE813QPWRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CDCE813QPWRQ1 part is unused and in its original packaging.
Return procedure for CDCE813QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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